/*
 *  Copyright 2008-2010 NVIDIA Corporation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */


/*! \file remove.h
 *  \brief Dispatch layer to the remove functions.
 */

#pragma once

#include <thrust/iterator/iterator_traits.h>

#include <thrust/detail/host/remove.h>
#include <thrust/detail/device/remove.h>

namespace thrust {

namespace detail {

namespace dispatch {

////////////////
// Host Paths //
////////////////
template < typename ForwardIterator,
         typename InputIterator,
         typename Predicate >
ForwardIterator remove_if(ForwardIterator first,
                          ForwardIterator last,
                          InputIterator stencil,
                          Predicate pred,
                          thrust::host_space_tag,
                          thrust::host_space_tag) {
    return thrust::detail::host::remove_if(first, last, stencil, pred);
}

template < typename InputIterator,
         typename OutputIterator,
         typename Predicate >
OutputIterator remove_copy_if(InputIterator first,
                              InputIterator last,
                              OutputIterator result,
                              Predicate pred,
                              thrust::host_space_tag,
                              thrust::host_space_tag) {
    // Note: this version can't be implemented by passing 'first' as the stencil
    // argument of function below as it would violate InputIterator's semantics.
    return thrust::detail::host::remove_copy_if(first, last, result, pred);
}

template < typename InputIterator1,
         typename InputIterator2,
         typename OutputIterator,
         typename Predicate >
OutputIterator remove_copy_if(InputIterator1 first,
                              InputIterator1 last,
                              InputIterator2 stencil,
                              OutputIterator result,
                              Predicate pred,
                              thrust::host_space_tag,
                              thrust::host_space_tag,
                              thrust::host_space_tag) {
    return thrust::detail::host::remove_copy_if(first, last, stencil, result, pred);
}


//////////////////
// Device Paths //
//////////////////
template < typename ForwardIterator,
         typename InputIterator,
         typename Predicate >
ForwardIterator remove_if(ForwardIterator first,
                          ForwardIterator last,
                          InputIterator stencil,
                          Predicate pred,
                          thrust::device_space_tag,
                          thrust::device_space_tag) {
    return thrust::detail::device::remove_if(first, last, stencil, pred);
}

template < typename InputIterator,
         typename OutputIterator,
         typename Predicate >
OutputIterator remove_copy_if(InputIterator first,
                              InputIterator last,
                              OutputIterator result,
                              Predicate pred,
                              thrust::device_space_tag,
                              thrust::device_space_tag) {
    // Note: this version can't be implemented by passing 'first' as the stencil
    // argument of function below as it would violate InputIterator's semantics.
    return thrust::detail::device::remove_copy_if(first, last, result, pred);
}

template < typename InputIterator1,
         typename InputIterator2,
         typename OutputIterator,
         typename Predicate >
OutputIterator remove_copy_if(InputIterator1 first,
                              InputIterator1 last,
                              InputIterator2 stencil,
                              OutputIterator result,
                              Predicate pred,
                              thrust::device_space_tag,
                              thrust::device_space_tag,
                              thrust::device_space_tag) {
    return thrust::detail::device::remove_copy_if(first, last, stencil, result, pred);
}

} // end namespace dispatch

} // end namespace detail

} // end namespace thrust

